The outage lasted only an hour and occurred overnight, according to Apple's status history page. Service has been completely restored, the company claims.

Some users reported continuing outages and troubles well into Friday morning, however.

The popular Apple rumor blog MacRumors reported the issue Thursday night, noting that the MobileMe status page warned that as many as 75 percent of users were unable to access email using the service.

The outage comes ahead of reports that Apple will officially launch its iCloud services at an iPhone event on Tuesday, Oct. 4, where the gadget company is expected to announce the latest version of the popular iPhone. The iCloud services will replace the MobileMe services, which will no longer be available as a paid sync service, Apple has said.